==11295== Invalid read of size 8
==11295==    at 0x5103326: PetscCheckPointer (checkptr.c:81)
==11295==    by 0x4F42058: PetscCommGetNewTag (tagm.c:77)
==11295==    by 0x4FC952D: PetscCommBuildTwoSidedFReq_Ibarrier (mpits.c:373)
==11295==    by 0x4FCB29B: PetscCommBuildTwoSidedFReq (mpits.c:572)
==11295==    by 0x52BBFF4: VecAssemblyBegin_MPI_BTS (pbvec.c:251)
==11295==    by 0x52D6B42: VecAssemblyBegin (vector.c:140)
==11295==    by 0x5328C97: VecLoad_Binary (vecio.c:141)
==11295==    by 0x5329051: VecLoad_Default (vecio.c:516)
==11295==    by 0x52E0BAB: VecLoad (vector.c:933)
==11295==    by 0x4013D5: main (solveCmplxLinearSys.cpp:31)
==11295==  Address 0x37f30bfc is 12 bytes inside a block of size 16 alloc'd
==11295==    at 0x4C2A603: memalign (vg_replace_malloc.c:899)
==11295==    by 0x4FD0B0E: PetscMallocAlign (mal.c:41)
==11295==    by 0x4FD23E7: PetscMallocA (mal.c:397)
==11295==    by 0x4FC948E: PetscCommBuildTwoSidedFReq_Ibarrier (mpits.c:371)
==11295==    by 0x4FCB29B: PetscCommBuildTwoSidedFReq (mpits.c:572)
==11295==    by 0x52BBFF4: VecAssemblyBegin_MPI_BTS (pbvec.c:251)
==11295==    by 0x52D6B42: VecAssemblyBegin (vector.c:140)
==11295==    by 0x5328C97: VecLoad_Binary (vecio.c:141)
==11295==    by 0x5329051: VecLoad_Default (vecio.c:516)
==11295==    by 0x52E0BAB: VecLoad (vector.c:933)
==11295==    by 0x4013D5: main (solveCmplxLinearSys.cpp:31)
==11295==